我们获得障碍物的距离信息和超声回波的强度信息，进行音频调制，向盲人提供更加丰富的信息。
The system acquired the distance information of obstacles as well as the power of reflected ultrasonic, and informs the blind with modulated audio signal.
飞机旋转部件的周期运动会对雷达信号的回波产生一个周期性的调制。
The periodical motion of aircraft rotating structures will cause a periodically modulated radar return signal.
正弦调制相位信号是微动目标雷达回波微多普勒信号的一般形式。
Signals with sinusoid modulated phase is the general form of micro-Doppler signals in radar echoes from targets with micro-motions.
本文提出了一种实用、完整的自适应回波抵消器，可用于实现高速调制解调器的二线全双工传输。
Realization of a practical and integrated adaptive echo canceller applies in high speed full duplex Modem is proposed in this paper.
如何测量回波的多普勒频移，实现测流速的目的。 文中从二维信号矢量的角度分析了多普勒频移调制和解调的过程，推导出提取速度信息的信号处理方法。
Using two-dimensional signal vectors, the process of Doppler shift modulation and demodulation is analyzed, and a signal processing method for extracting flow speed information is derived.
该方法通过对截获的雷达发射信号在慢时间域进行正弦相位调制，得到了等效微动点的回波信号。
In this method, the echo of the synthesized equivalent micro-motion point is obtained by modulating the phase of intercepted radar signal with sinusoid in the slow time.
通过试验分析了螺旋桨子回波的调制作用，并研究了螺旋桨子回波的影响大小，分析了影响大小与各种因素的关系。
Trough experiments the modulation effect of propeller echoes, its influence, the relationship between its influence and other factors are analyzed.
通过试验分析了螺旋桨子回波的调制作用，并研究了螺旋桨子回波的影响大小，分析了影响大小与各种因素的关系。
Trough experiments the modulation effect of propeller echoes, its influence, the relationship between its influence and other factors are analyzed.
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